This guide includes instructions and best practices for implementing, testing, and troubleshooting LazyApproval for Nintex Workflow 2013 and Nintex Workflow 2010.
Hi, Should there be internet access for SharePoint? (Access on the outside network)
I need to be able to confirm from outside the network.
Maybe, entegration Nintex and Exchange!
You should be able to use both Basic and Advanced for Lazy Approval. Lazy approval will connect to the existing SMTP service and SharePoint processes the incoming mail accordingly by response and token.
A benefit of using the advanced option would allow for a bit more customization.
Microsoft document on configuring incoming mail (for 2013) :
Let us know if there is anything else!